<It looks like IDE will be the way to go,  Allison has done a good proposa
<here.  Now we need to collect up the data sheets and make them availible 
<that a hardware design could be started.  I would suggest that we stay aw
<from surface mount components if we plan on making bare boards availible 

Assuming IDE for a moment for PIO with interrupts the chip count for 
ssi/msi generic ttl would be in under 20 pieces the most complex would 
something like ls273 and ls688.  The board for such a endevor would not 
have to be more than two layers plated through and wirewrap protos would 
be very doable.

If anyone has a copy of the microcomputer interfaces handbook (DEC 1980)
the DRV11P and bus timing/interface is in there.  The basic logic for an
interface to Qbus is address latch/recognition, bus buffering (byte/word)
and interrupt generation/grant.  The IDE side is byte or word depending 
on the address(register) written to or read from and the VAX/PDP-11
read before write must be dealt with.  PIO would be about as invloved
as a DLV-11E/F serial card.

The driver software however is a whole nother thing. 

Allison